Maya Blend Shape problem

[wormsign]

Okay, so I've been puttering around with a new character (the one I was asking all the Max questions about) and have begun making blend shapes for him (in Maya). So everything's been going alright, I managed to get a bunch of eyebrow shapes into the base mesh no problem.

I close out the file, and eventually go back to work on it, make a couple mouth shapes, go to add 'em and get this message in the script editor:

select -r Mouth_Wider ;
select -tgl skin ;
CreateBlendShapeOptions;
blendShape -parallel -n "Mouth_Wide";
// Error: Connection not made: 'Mouth_Wide.outputGeometry[0]' -> 'parallelBlender.inputTarget[0].inputTargetGroup[12].inputTargetItem[6000].inputGeomTarget'. Destination attribute must be writable. //
// Error: Connection not made: 'Mouth_Wide.outputGeometry[0]' -> 'parallelBlender.inputTarget[0].inputTargetGroup[12].inputTargetItem[6000].inputGeomTarget'. Destination attribute must be writable. //
// Error: Connection not made: 'Mouth_Wide.outputGeometry[0]' -> 'parallelBlender.inputTarget[0].inputTargetGroup[12].inputTargetItem[6000].inputGeomTarget'. Destination attribute must be writable. //
// Error: Problems occurred with dependency graph setup. //
// Error: Connection not made: 'Mouth_Wide.outputGeometry[0]' -> 'parallelBlender.inputTarget[0].inputTargetGroup[12].inputTargetItem[6000].inputGeomTarget'. Destination attribute must be writable. //

The funny thing is, the names for these attempted additional shapes show up in the blend shape control window, but there's no envelope or anything on em, just the name and the basic blend shape options (sans envelope slider, source mesh name and 'key' button).

So after deleting history on my duplicates and trying again, no go. went searching the internet and have found only two hits for this, one suggested deleting history on the base mesh (which only serves to wipe out my existing shapes) and the other got no replies.

Anybody got any ideas on this one?- cuz I'm too frustrated and stumped to look at this clearly...

[Yung]

I would recommend you to do the following. First would to activate all your existing blendshapes to one, make a duplicate and move that away. Once u are sure every blendshapes is duplicated out, you can delete the history on that base mesh and try again.

Second, I won't recommend using anything other then Front of chain for the blendshape. Right now it seems you have it on parallelBlend, is that on purpose?